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TAJO-1311: Enable Scattered Hash Shuffle for CTAS statement. #478
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Rebasing commits against the master branch. :) |
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Testcases in travis-ci failed, but testcases in apache build servers has been passed. Please see details in the following link. |
…into TAJO-1311-NEW
…into TAJO-1311-NEW
…into TAJO-1311-NEW
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Rebased |
…into TAJO-1311-NEW
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+1 thanks for your contribution! |
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Currently, Tajo just use hash shuffle for CTAS statement. If you use large partitioned table for target table, you will see poor performance of wrong task number. Thus, we need to calculate the number for the partitioned table with scattered hash shuffle.